i changed two settings in nvidia control panel, and so far i haven't seen any blobs (yet) after an extended play session today and yesterday:
in "Manage 3D settings" > "Global Settings":
Power management mode (Adaptive)
Shader Cache Size (10 GB)
personally idk if the in-game graphics settings would matter here, but i may as well post them just in case:
Texture Quality: Medium
Shadows Quality: Low
Object LOD Quality: 3
Overall Visibility: 1500
Anti-Aliasing: TAA
Resampling: 1x Off
DLSS: Off
FSR: Off
HBAO: High Performance
SSR: High
Anisotropic Filtering: Per Texture
Nvidia Reflex: On
Mip Streaming: On (prior to this blobs would appear whether it was on or off)
Mip Streaming Buffer Size: 64
Mip Streaming Disk Usage Limit: 1024
so far so good, but if they come back then i'll just put my foot in my mouth or something